Title :
High efficiency multi-band envelope tracking power amplifier with tunable output frequency bands
Author :
Chan-Sei Yoo ; Youjiang Liu ; Fairbanks, John ; Asbeck, Peter ; Theilmann, Paul ; Kimball, Donald
Author_Institution :
Electron. Mater. & Device Res. Center, Korea Electron. Technol. Inst., Seongnam, South Korea
Abstract :
A multi-band power amplifier (PA) with electrically tunable output matching network is reported, whose output power and efficiency can be optimized over multiple frequencies (750MHz, 880MHz and 940MHz). It is incorporated within an envelope tracking (ET) amplifier using a high efficiency dynamic envelope voltage supply. High efficiency (50%) for all the three bands has been demonstrated with good output linearity, using a memory digital predistortion (DPD) method.
Keywords :
UHF power amplifiers; PA; electrically tunable output matching network; envelope tracking amplifier; frequency 750 MHz; frequency 880 MHz; frequency 940 MHz; memory digital predistortion; multi-band power amplifier; Digital signal processing; Frequency conversion; Irrigation; Memory management; Microstrip; Radio frequency; Switches; digital predistortion; envelope tracking; power amplifiers; tunable matching;
Conference_Titel :
Wireless and Microwave Technology Conference (WAMICON), 2015 IEEE 16th Annual
Conference_Location :
Cocoa Beach, FL
DOI :
10.1109/WAMICON.2015.7120372
